body{
    margin: 0;
    padding: 0;
    background-image: url("../image/little car.jpg");
    background-size: cover;
}


.login-area{
    width: 440px;
    height: 440px;
    background-color: white;
    margin: 0 auto;
    margin-top: 120px;
    border-radius: 7px;
    background: rgba(0,0,0,0.2);
}

.login-area h2{
    width: 100%;
    height: 77px;
    text-align: center; /*文字水平居中*/
    line-height: 77px; /*文字垂直居中*/
    font-weight: 200;
    color: rgba(33, 110, 224,0.8);
    border-bottom: 1px solid lightskyblue;

}

.login-form{
    width: 80%;
    height: 320px ;
    margin: 0 auto;
    margin-right: 30px;
    margin-top: 60px;
}

.ipt-username{
    width: 320px;
    height: 42px;
    border: 1px  solid skyblue;
    border-radius: 4px ;/*圆角*/
    outline: none;
    padding-left: 10px;
    margin-top: 20px;
}
.ipt-usernamea{
    width: 200px;
    height: 42px;
    border: 1px  solid skyblue;
    border-radius: 4px ;/*圆角*/
    outline: none;
    padding-left: 10px;
    margin-top: 20px;
}
.yanzhengma{
    background-color: lightskyblue;
    height: 50px;
    border-radius: 5px;
}


.login-btn{
    width: 320px;
    height: 42px;
    margin: 0 auto;
    background-color: skyblue;
    color: white;
    border: none ; /*去除边框*/
    border-radius: 4px ;/*圆角*/
    margin-top: 40px;
}
.ipt-btn{
    width:50%;
    height: 40px;
    border: 1px  solid lightskyblue;
    border-radius: 5px ;/*圆角*/
    outline: none;
    background-color: skyblue;
    margin-left: 160px;
    padding-left: 10px;
    margin-top: 20px;
}

/*鼠标悬浮在按钮上*/
.login-btn:hover{
    cursor: pointer; /*光标 变成 小手*/
    background-color: lightskyblue;
}